Console application - exit application and order of code

[Lykurg]

for that simple project you don't need a QCoreApplication. Simply call

return 0;

return 0;

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and your program will exit. (alternatively you can call the quit slot of the applications object.)

As to the order to avoid possible problems in future, put the initialization of the core application at the beginning of the main function.

[tbscope]

Just a note that you can call the quit slot before a.exec(), but it will not have any effect since the event loop is not running.
Either call quit() after a.exec(), as in create objects that you instantiate in your main function and that use the event loop.
Or use a timer, but then you don't really need the event loop in the first place I guess.